v0.51.719

What's Changed

• fix(streaming): delegate image routing to agent canonical, preserve unknown-model multimodal (salvage of #4113) by @nesquena-hermes in #5104
• fix: harden None providers config across onboarding/providers/routes (salvage of #3967) by @nesquena-hermes in #5102
• fix(mobile): PWA reflow guard + avoid redundant same-session refresh (salvage of #3976) by @nesquena-hermes in #5108

Full Changelog: v0.51.718...v0.51.719